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What is the difference between char s[] and char *s?
...iteral string "Hello world" is in "read-only parts of the memory" in both examples. The example with the array points there, the example with the array copies the characters to the array elements.
– pmg
Nov 9 '09 at 22:42
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Need a simple explanation of the inject method
...t registering how the number 10 can become the result. Would someone mind explaining what's happening here?
16 Answers
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Convert floats to ints in Pandas?
...is there a way to prevent Pandas from converting types to begin with? For example try DF.({'200': {'#': 354, '%': 0.9971830985915493}, '302': {'#': 1, '%': 0.0028169014084507044}}) Note the # get converted to float and they are rows, not columns. because each is a Series which can only store a sin...
Measuring text height to be drawn on Canvas ( Android )
Any straight forward way to measure the height of text?
The way I am doing it now is by using Paint's measureText() to get the width, then by trial and error finding a value to get an approximate height. I've also been messing around with FontMetrics , but all these seem like approximate methods ...
How can one print a size_t variable portably using the printf family?
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Use the z modifier:
size_t x = ...;
ssize_t y = ...;
printf("%zu\n", x); // prints as unsigned decimal
printf("%zx\n", x); // prints as hex
printf("%zd\n", y); // prints as signed decimal
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What is :: (double colon) in Python when subscripting sequences?
...ond, and jump by three'. It gets every third item of the sequence sliced.
Extended slices is what you want. New in Python 2.3
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How to convert a SVG to a PNG with ImageMagick?
I have a SVG file that has a defined size of 16x16. When I use ImageMagick's convert program to convert it into a PNG, then I get a 16x16 pixel PNG which is way too small:
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How do I analyze a program's core dump file with GDB when it has command-line parameters?
...ith GDB in many ways, but passing parameters which is to be passed to the executable to GDB is not the way to use the core file. This could also be the reason you got that error. You can use the core file in the following ways:
gdb <executable> <core-file> or gdb <executable> -c &...
Insert ellipsis (…) into HTML tag if content too wide
...got a solution working in FF3, Safari and IE6+ with single and multiline text
.ellipsis {
white-space: nowrap;
overflow: hidden;
}
.ellipsis.multiline {
white-space: normal;
}
<div class="ellipsis" style="width: 100px; border: 1px solid black;">Lorem ipsum dolor sit amet, consec...
Finding Variable Type in JavaScript
...lly need the instanceof operator.
Update:
Another interesting way is to examine the output of Object.prototype.toString:
> Object.prototype.toString.call([1,2,3])
"[object Array]"
> Object.prototype.toString.call("foo bar")
"[object String]"
> Object.prototype.toString.call(45)
"[object ...